JT1, you put it very well. I don't think limiting herself has anything to do with it either; I think what she does is really all she can do.

you guys are probably right, but it's all by design. i read an interview with jack white someplace where he said he doesn't want her to get any better. he doesn't want her to take lessons or practice. he's deliberately trying to get a naive, ultra simple sound out of her because that's exactly what he's going for with the white stripes.